/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
Copyright (C) 2006 Robert Beckebans <trebor_7@users.sourceforge.net>

This file is part of XreaL source code.

XreaL source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.

XreaL source code is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with XreaL source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/

// this is only used for visualization tools in cm_ debug functions

typedef struct
{
	int             numpoints;
	vec3_t          p[4];		// variable sized
} winding_t;

#define	MAX_POINTS_ON_WINDING	64

#define	CLIP_EPSILON	0.1f

// you can define on_epsilon in the makefile as tighter
#ifndef	ON_EPSILON
#define	ON_EPSILON	0.1f
#endif

winding_t      *AllocWinding(int points);
vec_t           WindingArea(winding_t * w);
void            WindingCenter(winding_t * w, vec3_t center);
void            ClipWindingEpsilon(winding_t * in, vec3_t normal, vec_t dist,
								   vec_t epsilon, winding_t ** front, winding_t ** back);
winding_t      *ChopWinding(winding_t * in, vec3_t normal, vec_t dist);
winding_t      *CopyWinding(winding_t * w);
winding_t      *ReverseWinding(winding_t * w);
winding_t      *BaseWindingForPlane(vec3_t normal, vec_t dist);
void            CheckWinding(winding_t * w);
void            WindingPlane(winding_t * w, vec3_t normal, vec_t * dist);
void            RemoveColinearPoints(winding_t * w);
int             WindingOnPlaneSide(winding_t * w, vec3_t normal, vec_t dist);
void            FreeWinding(winding_t * w);
void            WindingBounds(winding_t * w, vec3_t mins, vec3_t maxs);

void            AddWindingToConvexHull(winding_t * w, winding_t ** hull, vec3_t normal);

void            ChopWindingInPlace(winding_t ** w, vec3_t normal, vec_t dist, vec_t epsilon);

// frees the original if clipped
void            pw(winding_t * w);
